Web UI

The web UI daemon runs on the server and the clients only need a web browser. You need to install python2-mako on the server.

First, start the web UI daemon, named deluge-web, and login at http://ip-address:8112. Where ip-address is the name of your Deluge server or its private or public IP address. When asked for a password, enter "deluge" as it is the default password.

The preferences in the web UI should be rather self explanatory and the first obvious thing to do is to change your password.

Automatically Connect To Daemon

If you want to avoid clicking "connect" everytime you start the Deluge web UI, edit the web.conf file in your configuration directory (usually /srv/deluge/.config/deluge).
It should have a line like this towards the bottom:

"default_daemon": ""

Change it to:

"default_daemon": "127.0.0.1:58846"

This assumes that your Deluge port is the default 58846.

SSL

In case you want SSL for the web UI, you need to generate a new cert/key set. To do this, first stop the web UI daemon and then append to /srv/deluge/.config/deluge/ssl/:

Web UI doesn't store settings

For some yet unknown reason, the web interface with Deluge 1.3.3 refuses to properly store the incoming (listen) ports configuration. This can manually be edited in core.conf. The Deluge bugtracker mentions this is fixed, it is not in 1.3.3.